I have a static IP on my home Tomato router that has a host name.
I can't post domain names, so I'll use DOMAIN for the dot com and A-DOMAIN for the subdomain as examples.
From inside the network, I can go to A-DOMAIN or B-DOMAIN to hit servers a and b.
But from outside the network, I have to use port forwarding. DOMAIN:8000, DOMAIN:8001, etc.
It would be amazing if I can firewall and route specific ports to named hosts so the first example a.foo.com maps all or some ports to the server "a".
Some kind of UI would be important, so that not all my devices and ports are accessible…
So, I might want to forward 80 and 22 to host A, and forward 80 and 443 to B, for example.
I think its a great idea for people running many servers on a single IP. Am I nuts? I hate port forwarding to arbitrary numbers!! :)